Improvement in compositions for fire-bricks



UNITED STATES PATENT OFFICE.

EDWARD F. ROGERS, OF CHELSEA, ASSIGNOR TO HIMSELF, STOUGHTON B. HOLDEN, OF WOBURN, AND LUTHER L. HOLDEN, OF BOSTON, MASS.

IMPROVEMENT IN COMPOSITIONS FOR FIRE-BRICKS.

Specification forming part of Letters Patent No. 119,723, dated October 10, 1871.

To all whom it may concern:

Be it known that I, EDWARD F. Roenns, of Chelsea, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Fire-Brick, of which the following is a specification:

The present invention relates to certain new and useful improvements in fire-bricks whereby a lighter, more durable, and less expensive firebrick than those ordinarily in use, and one that will not clinker, is produced.

My improved fire-brick is composed of the following materials, compounded in the proportions and in the manner hereinafter described: Of gilders whiting or magnesia I take two parts, generally using the former on account of its cheapness, together with two parts of plaster of Paris, and one part of black lead or lamp-black, and mix the above ingredients with a'solution of soda water made from common washing soda or any kindred solution. I then work up the above mixture in the method adopted in making brick from clay. The compound is then left to dry in a warm atm0sphere-not in the sunsay of sixty degrees, for thirty hours, and then baked in an oven, and is generally formed in pieces of one inch in thickness. I

By the process above-described a fire-brick is made which can be cut and used the same as and in place of soap-stone, is lighter in weight, more durable, cheaper per pound than, and will not clinker, like ordinary fire-brick, and is easily transported, and can be used in thin pieces for stoves, ranges, furnaces, 8110.

Having thus described my improvements, what I claim as my invention, and desire to have secured to me by Letters Patent, is

Fire-bricks composed substantially of the several ingredients specified herein, and in the manner substantially as described.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD F. ROGERS.

Witnesses CARROLL D. WRIGHT, SAML. M. BARTON. 

